Banana Spider is scientifically called Phoneutria spp. It is also known as the Brazilian Wandering Spider. It was so-named because it wanders the floor of the forest at night instead of staying on its web. This highly aggressive creature is considered by the Guiness World Records as the world's most venomous spider. It can be found in
Central and
South America
. It is known in Portuguese as Aranhas-armadeiras which means Armed Spider

The Sydney Funnelweb Spider or Atrax robustus is
Australia
’s deadliest spider and one of the most venomous in the world. This Australian critter is very deadly and can kill in minutes. This medium-to-large spider with a body length ranging from 2 cm to 7 cm is glossy and darkly colored. There is at least one recorded case of a small child dying within 15 minutes of a bite from a
Sydney
funnel-web spider but since the antivenom was developed in 1980, there have been no recorded fatalities.

The Black Widow or Latrodectus sp. can be found worldwide. It was so-named due to the behavior of the female of eating the male after mating. The Black Widow Spider is known for the neurotoxic venom latrotoxin it injects which is a comparatively dangerous spider bite, resulting in the condition latrodectism. The female Black Widow's bite is particularly harmful to humans because of its unusually large venom glands; however, Latrodectus bites rarely kill human beings if their wounds are given medical treatment.

The Violin Spider, also known as Recluse Spider, is a venomous spider that can be found in many parts of the world. It is scientifically called Loxesceles recluse. It size ranges between 6–20 mm but may grow larger. This arachnid usually has marking on the dorsal side of its cephalothorax, with a black line coming from it that looks like a violin with the neck of the violin pointing to the rear of the spider, resulting in the nicknames Fiddleback Spider, Brown Fiddler or Violin Spider.

The sac Spider or Cheiracanthium punctoriom can be found in Central Europe and central
Asia
. It can grow up to 15 cm in length. The bite of this venomous spider is similar to a wasp sting, perhaps a bit more severe, although susceptible persons can have stronger reactions, like nausea. It is the only toxic spider in
Germany
and can only be found in Kaiserstuhl region.

Tarantulas are perhaps the most popular spiders in the world. These creepy-looking critters are becoming popular pets and are readily available in captivity. The four known most venomous Tarantulas in the world are Eurypelma rubropilosum, Acanthoscurria atrox, Lasiodora klugi and Pamphobeteus sp. Tarantulas are also called Athropodes. Despite their often threatening appearance and reputation, no Tarantula has been known to have a bite that is deadly to humans.